i wonder, i would begin, secretary napolitano, with you. apart from your statement in your prepared remarks, are there additional steps, are there some that you'd like to highlight at this point which you think we can or should take to deter or detect future attacks on our aviation system's? >> well, i think the whole aviation sector demonstrates you have a layered approach so that if someone or some group is able to debate one letter, another letter can pick them up. but it became fundamentally with good intelligence. good intelligence sharing with our international partners, good intelligence within the aviation sector, good intelligence sharing among the federal family. it goes to the standards that we require for planes down for the u.s., both for passengers and for cargo, and how we inspect those standards. it goes to what we are -- what we ourselves require of airports and airports authorities that control the perimeter of the airport. without one or or two incidents of breach this last you. we've jumped on both of those to see why an